An SQL result set is a set of rows from a database, as well as metadata about the query such as the column names, and the types and sizes of each column. Depending on the database system, the number of rows in the result set may or may not be known. Usually, this number is not known up front because the result set is built on-the-fly. Precomputations often impose undesired performance impacts.
A result set is effectively a table. The ORDER BY clause can be used in a query to impose a certain sort condition on the rows. Without that clause, there is no guarantee whatsoever on the order in which the rows are returned.
Famous quotes containing the words result and/or set:
“Morals are in all countries the result of legislation and government; they are not African or Asian or European: they are good or bad.”
—Denis Diderot (1713–1784)
“It is a great mistake to suppose that clever, imaginative children ... should content themselves with the empty nonsense which is so often set before them under the name of Children’s Tales. They want something much better; and it is surprising how much they see and appreciate which escapes a good, honest, well- informed papa.”
—E.T.A.W. (Ernst Theodor Amadeus Wilhelm)